/cores/xmc/Uart.h: Fix typo.

Signed-off-by: zhanglinjing <Linjing.Zhang@infineon.com>

Author: LinjingZhang

cores/xmc/Uart.h

@@ -90,7 +90,7 @@ typedef enum XMC_UART_MODE {
 class Uart : public HardwareSerial {
 public:
     XMC_UART_t *_XMC_UART_config;
-    q Uart(XMC_UART_t *xmc_uart_config, RingBuffer *rx_buffer, RingBuffer *tx_buffer);
+    Uart(XMC_UART_t *xmc_uart_config, RingBuffer *rx_buffer, RingBuffer *tx_buffer);
 
     void begin(unsigned long);
     void begin(unsigned long baudrate, uint16_t config) override;